<template>
  <div class="detailPage">
    <!-- 轮播图 -->
    <van-swipe class="my-swipe" :autoplay="3000" indicator-color="#1989fa">
      <van-swipe-item v-for="item in gallery" :key="item.id">
        <img :src="item.img_url" alt="" width="100%" />
      </van-swipe-item>
    </van-swipe>

    <!-- Tips组件 -->
    <Tips />

    <!-- 产品信息渲染和展示弹出层 -->
    <div class="info">
      <h3>{{ info.name }}</h3>
      <p>{{ info.goods_brief }}</p>
      <div>{{ info.retail_price | RMBFormat }}</div>
    </div>
    <van-cell title="展示弹出层" is-link @click="isShowSku = true" />

    <!-- 商品参数 -->
    <div class="attribute">
      <h4>商品参数</h4>
      <ul>
        <li v-for="(item, index) in attribute" :key="index">
          <span>{{ item.name }}</span>
          <section class="van-ellipsis">{{ item.value }}</section>
        </li>
      </ul>
    </div>

    <!-- 产品详情图片 -->
    <div class="goods_desc" v-html="info.goods_desc"></div>

    <!-- 常见问题 -->
    <div class="title">
      <span>常见问题</span>
    </div>
    <ul class="issue">
      <li v-for="item in issue" :key="item.id">
        <h3>{{ item.question }}</h3>
        <p>{{ item.answer }}</p>
      </li>
    </ul>

    <!-- 相关产品 -->
    <div class="title">
      <span>相关产品</span>
    </div>

    <Products :productsListData="goodsList" />

    <!-- 商品导航 -->
    <AppGoodsAction :goodsCount="goodsCount" @showSku="addToCart" />

    <!-- 加入购物车显示的商品规格 -->
    <van-sku
      ref="sku"
      v-model="isShowSku"
      :sku="sku"
      :goods="goods"
      :hide-stock="sku.hide_stock"
    />
  </div>
</template>

<script>
import AppGoodsAction from "@/components/AppGoodsAction.vue";
import Products from "@/components/Products.vue";
import Tips from "@/components/Tips.vue";
import {
  GetGoodsDetail,
  GetGoodsRelated,
  GetCartNum,
  ToAddCart,
} from "@/request/api";
export default {
  components: {
    Tips,
    Products,
    AppGoodsAction,
  },
  data() {
    return {
      // SKU商品规格数据
      isShowSku: false,
      sku: {
        tree: [],
        price: "1.00", // 默认价格（单位元）
        stock_num: 227, // 商品总库存
        hide_stock: false, // 是否隐藏库存
      },
      goods: {
        // 默认商品 sku 缩略图
        picture: "",
      },
      // 轮播图数据
      gallery: [],
      // 渲染详情页时候的数据
      info: {},
      attribute: [],
      issue: [],
      goodsList: [],
      // 购物车数量
      goodsCount: 0,

      //用来传数据的
      productList: [],
    };
  },
  methods: {
    addToCart() {
      //console.log("显示");
      // 如果sku是真是的,那么就是执行真正的加购物车操作
      if (this.isShowSku) {
        let stepNum = this.$refs.sku.getSkuData().selectedNum;
        // 真正执行发起加入购物车的请求
        ToAddCart({
          goodsId: this.$route.query.id,
          productId: this.productList[0].id,
          number: stepNum,
        }).then((res) => {
          console.log("点击加入购物车之后的res", res.data);
          // 更新购物车数量
          this.goodsCount = res.data.cartTotal.goodsCount;
          // 提示添加成功
          this.$toast.success("添加成功!");
        });
      }

      this.isShowSku = !this.isShowSku;
    },
  },
  created() {
    GetGoodsDetail({
      id: this.$route.query.id,
    }).then((res) => {
      console.log("商品详情", res);
      // 详情页展示数据
      let { gallery, info, attribute, issue, productList } = res.data;
      this.gallery = gallery;
      this.info = info;
      this.attribute = attribute;
      this.issue = issue;
      // sku中的商品数据
      this.goods.picture = info.list_pic_url;
      this.sku.price = info.retail_price;
      this.sku.stock_num = info.goods_number;
      this.productList = productList;
    });

    GetGoodsRelated({
      id: this.$route.query.id,
    }).then((res) => {
      //   console.log("相关产品", res.data);
      let { goodsList } = res.data;
      this.goodsList = goodsList;
    });

    GetCartNum().then((res) => {
      console.log("购物车数量", res.data);
      this.goodsCount = res.data.cartTotal.goodsCount;
    });
  },
};
</script>
 
<style lang = "less" scoped>
.detailPage {
  padding-bottom: 0.5rem;
}
.info {
  background: #fff;
  text-align: center;
  padding: 0.2rem 0;
  h3 {
    font-weight: normal;
    font-size: 0.2rem;
    line-height: 0.5rem;
  }
  p {
    color: #999;
    font-size: 0.14rem;
    line-height: 0.3rem;
  }
  div {
    color: darkred;
    font-size: 0.14rem;
    line-height: 0.3rem;
  }
}
.attribute {
  margin-top: 0.2rem;
  background: #fff;
  padding: 0.2rem 4%;
  h4 {
    font-weight: normal;
    font-size: 0.16rem;
    margin-bottom: 0.2rem;
  }
  ul {
    li {
      background: #efefef;
      line-height: 0.4rem;
      height: 0.4rem;
      margin-bottom: 0.1rem;
      border-radius: 4px;
      display: flex;
      justify-content: space-between;
      span {
        width: 30%;
        text-align: right;
      }
      section {
        flex: 1;
        padding-left: 0.2rem;
      }
    }
  }
}
/* 如果样式无法替换，可以试试/deep/ 深度样式写法 */
/deep/.goods_desc {
  img {
    max-width: 100%;
    display: block;
  }
}
.title {
  width: 100%;
  background: #fff;
  height: 0.5rem;
  position: relative;
  &::before {
    content: "";
    width: 50%;
    height: 2px;
    background: #ccc;
    position: absolute;
    top: 50%;
    margin-top: -1px;
    left: 50%;
    margin-left: -25%;
  }
  span {
    width: 30%;
    position: relative;
    background: #fff;
    display: block;
    text-align: center;
    margin: 0 auto;
    height: 0.5rem;
    line-height: 0.5rem;
  }
}
.issue {
  padding: 0 4%;
  background: #fff;
  li {
    h3 {
      height: 0.3rem;
      line-height: 0.3rem;
      padding-left: 0.2rem;
      position: relative;
      font-weight: normal;
      &::before {
        content: "";
        width: 4px;
        height: 4px;
        background: darkred;
        display: inline-block;
        position: absolute;
        left: 0;
        top: 50%;
        margin-top: -2px;
      }
    }
    p {
      font-size: 0.12rem;
      line-height: 0.2rem;
      padding-left: 0.2rem;
    }
  }
}
/deep/.van-sku-messages {
  padding: 0;
}
.van-sku-container {
  min-height: auto;
}
/deep/.van-sku__stepper-title,
/deep/.van-sku__stepper {
  float: none;
}
</style>